153 results about "Oscillator system" patented technology

The application discloses a method of making a balance spring (100) from continuous fibres or ceramic by winding them around a cylindrical former (90), interspaced with a releasing agent (110). Also disclosed is a method of making a balance spring, preferably of a ceramic material (60), by applying it to a rotating former (70) mandrel or plate and subsequently heat treating. Balance wheels (30) having a moment of inertia which decreases with a rise in temperature due to a special arrangement of components (8, 9, 10) having different coefficients of thermal expansion are also disclosed. A mechanical oscillator system comprising a non-magnetic ceramic or continuous fibre balance spring (50) and a non-magnetic balance wheel (30) formed of a material having a coefficient of thermal expansion of less than 6×10−6K−1 and having a plurality of non-magnetic poising or timing appendages (5) is also disclosed.

There are many inventions described and illustrated herein. In one aspect, the present inventions relate to oscillator systems which employ a plurality of microelectromechanical resonating structures, and methods to control and / or operate same. The oscillator systems are configured to provide and / or generate one or more output signals having a predetermined frequency over temperature, for example, (1) an output signal having a substantially stable frequency over a given / predetermined range of operating temperatures, (2) an output signal having a frequency that is dependent on the operating temperature from which the operating temperature may be determined (for example, an estimated operating temperature based on a empirical data and / or a mathematical relationship), and / or (3) an output signal that is relatively stable over a range of temperatures (for example, a predetermined operating temperature range) and is “shaped” to have a desired turn-over frequency.

An oscillator system is disclosed and includes an oscillator circuit having a differential output producing a differential output signal thereat having a frequency that is a function of an input voltage. The oscillator system further includes an output buffer coupled to the differential output of the oscillator circuit. The output buffer includes an inductive voltage divider circuit configured to weaken a loading at the oscillator differential output and it increases the output power.

A system comprising a voltage controlled oscillator is disclosed. The voltage controlled oscillator includes a single input, a power input, and an oscillation input. The oscillation input is coupled to a amplitude detection device, which in turn provides an indication of an amplitude of the output of the VCO to a threshold detect module. Based upon the threshold detected at the threshold detect module, a threshold indicator is provided to a voltage supply module. The voltage supply powering the voltage controlled oscillator is varied, based upon a value of the threshold indicator.

An oscillator system addresses power supply noise and temperature dependence. The system includes a multi-stage regulator circuit that receives a supply voltage and generates a lower voltage oscillator supply voltage that is less noisy than the supply voltage. A charge pump circuit receives the oscillator supply voltage and the oscillator output signal and supplies the regulator circuit with a boosted voltage. A reference generator circuit supplies a reference signal that is used to determine the oscillator supply voltage. The reference signal varies with temperature and is used to offset the temperature coefficient of the oscillator.

The invention provides an optical anti-vibration voice coil motor capable of changing tilt shift centre, comprising a substrate, at least one elastic sheet, a lens carrier, at least three magnetic body groups and a shell. The pedestal, the shell and the magnetic body groups are connected together to form a fixed structure. The magnetic body groups are arranged in the shell; the lens carrier comprises a main body and coils arranged on the main body. The number of the coils is the same as that of the magnetic body groups. The coils and the magnetic body groups are arranged oppositely one by one. The elastic sheet is connected with the lens carrier and the magnetic body groups to form a multi-variant spring oscillator system with a spring centre. The elastic sheet is electrically connected with the coils. The direction of the electromagnetic resultant force of each coil is not faced to and not back to the spring centre, and is not parallel to an optical axis. By adjusting the size of each resultant force, the motor could be used for controlling the tilt shift of the lens to be tilted and be moved along the optical axis to achieve an optical anti-vibration function and an automatic focusing function. By adopting the above structure, the optical anti-vibration voice coil motor not only is simple in structure, and high in reliability, and reduces production cost, but also could maintain excellent image resolution and resist magnetic disturbance.

The disclosed system comprises two groups of acoustic surface wave oscillator composed of acoustic surface wave delay line, radio frequency amplifier and phasing network, and one group of mixer circuit composed of mixer, low frequency amplifier and low pass filter. Outputs of two groups of oscillator are connected to the mixer. The output of the mixer passing through low pass filter and low frequency amplifier outputs signal of difference frequency between two groups of oscillator. Two groups of delay line are fabricated on same substrate. Single-phase unidirectional transducer (SPUDT) structure is adopted in delay line so as to reduce insertion loss. Length of the long transducer is equal to distance between geometric centers of transducers. Comb structure is adopted, and gap between combs is equal to length of the short transducer in order to restrain unwanted mode of oscillation. The oscillator is operated at single mode so as to raise frequency stability (0.07 ppm).

Briefly, in accordance with embodiments of the invention, switched capacitors may be utilized to emulate resistors in a longer time constant feedback network for amplitude regulation of a crystal oscillator.

A clock oscillator system for use in providing the switching regulator duty cycle control in a fixed frequency (no cycle skipping) operation is provided. In one embodiment, the circuit according to the invention uses an analog feedback loop to extend the switch ON time of the clock cycle by controlling the oscillator charging current and, thereby, increase the duty cycle. Preferably, this circuit can achieve very high switching duty cycle and / or very low switching duty cycle in a PWM switching regulator operated in very low drop-out operation when very high duty cycle is required or in other conditions when very low duty cycle is required.

An RFID transponder detector is provided having a coupled oscillator system. Coupled first and second LC pairs of the system produce a detection signal each time a combination of pulses is applied to the LC pairs. Application of the pulses is repeated periodically to produce a sequence fo detection signals having two different first and second detection frequencies. Transmitting the sequence of detection signals results in corresponding first and second response signals having the first and second detection frequencies at the LC pairs. Values of a preselected detection parameter for the detection signals are compared to the values of the detection parameter for the response signals to determine if a transponder having a transponder resonant frequency corresponding to the first or second detection frequency is present in a proximal space of the transponder detector.

A system comprising a voltage controlled oscillator is disclosed. The voltage controlled oscillator includes a single input, a power input, and an oscillation input. The oscillation input is coupled to a amplitude detection device, which in turn provides an indication of an amplitude of the output of the VCO to a threshold detect module. Based upon the threshold detected at the threshold detect module, a threshold indicator is provided to a voltage supply module. The voltage supply powering the voltage controlled oscillator is varied, based upon a value of the threshold indicator.

The invention relates to a surface acoustic wave (SAW) harmonic oscillator system used for a gas sensor. The SAW harmonic oscillator system used for the gas sensor comprises SAW oscillators and a mixer circuit, wherein the SAW oscillators are divided into two groups, the two groups of SAW oscillators adopt two ends, with single resonant mode and a high Q value, of an aluminum / gold electrode to manufacture SAW resonators on the same piezoelectric substrate. Each SAW oscillator comprises an SAW resonator, an operational amplifier, a matched network and a phase-shift network, wherein the output end of the SAW resonator is directly connected with an input end of the operational amplifier through the matched network, an output end of the operational amplifier is connected with the phase-shift network, an output end of the phase-shift network is connected with an input end of the SAW resonator through the matched network, and therefore output signals of the operational amplifier are fed back to the SAW resonator. Output ends of the two groups of SAW oscillators are connected with the mixer circuit, output of the mixer circuit is interfered by a low pass filter which filters high-frequency signals, and then difference frequency signals of the two groups of SAW oscillators are output after the amplification of a low-frequency amplifier.

A reservoir unit which is included as an element along a circulation path of a cooling system includes a cartridge and a cartridge loading unit which are configured to be removable from each other. The cartridge includes a reservoir chamber that stores a circulating liquid, and a connection portion in fluid communication with the reservoir chamber. The cartridge loading unit includes a connection receiving portion, to which the connection portion is connected, and a connection port. When the cartridge and the cartridge loading unit are attached to each other, the connection portion, the connection receiving portion and the connection port form a feed path that allows feeding the circulating liquid to the circulation path outside, and a collection path that allows collecting the circulating liquid into the reservoir chamber.

A clock oscillator system for use in providing the switching regulator duty cycle control in a fixed frequency (no cycle skipping) operation is provided. In one embodiment, the circuit according to the invention uses an analog feedback loop to extend the switch ON time of the clock cycle by controlling the oscillator charging current and, thereby, increase the duty cycle. Preferably, this circuit can achieve very high switching duty cycle and / or very low switching duty cycle in a PWM switching regulator operated in very low drop-out operation when very high duty cycle is required or in other conditions when very low duty cycle is required.

Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter.

An oscillator system comprises the components of an operational amplifier which works in a sub-threshold region, wherein two input ends are respectively connected with a first end of a reference resistor and a first end of a switch capacitor circuit, an output end of the operational amplifier outputs first voltage, the reference resistor and the switch capacitor circuit are connected with one pathof reference current; a first capacitor of which the positive end is connected with the output end of the operational amplifier, and the negative end is grounded; a periodical signal module which converts a first voltage DC component to a periodical signal and outputs a first periodical signal after halving of the periodical signal and converts a second periodical signal after halving of the periodical signal to a third periodical signal and a fourth periodical signal that have opposite phases and are not stacked; and the switch capacitor circuit which comprises a second capacitor and controls charging and discharging of a second capacitor according to the third periodical signal and the fourth periodical signal, wherein the operational amplifier, the periodical signal module and the switch capacitor circuit form a negative feedback loop, and output frequency stability is ensured. Furthermore the operational amplifier works in the sub-threshold region and ultralow power consumption ofthe oscillator system is realized.

The present invention discloses an optical parametric oscillator system (100) for a laser. The optical parametric oscillator system (100) includes a pump source, an optical parametric oscillator (102), and a mixer (103); the pump source includes a first pump source (1) and a second pump source (13); the first pump source (1) is used for providing first pump light and second pump light, wherein thefirst pump light is provided for the optical parametric oscillator (102); the second pump source (13) is used for providing seed laser entering the optical parametric oscillator (102); the optical parametric oscillator (102) is configured to process the first pump light and the seed laser to generate first signal light; and the mixer is configured to perform mixing processing on the second pump light and the first signal light to output second signal light. The optical parametric oscillator system for the laser of the present invention is compact in structure, high in stability, and is suitable for ultra-high repetition frequency and high-energy lasers.

The invention relates to a high-accuracy temperature compensation crystal oscillator system and an operational method of the high-accuracy temperature compensation crystal oscillator system. The high-accuracy temperature compensation crystal oscillator system comprises a computer, a power supply, an incubator, a frequency meter, a frequency-scaling and data-transporting and displaying unit, a data input and output (DIO) card used for driving the testing controlling board arranged on the computer mainboard in an inserting mode, and a general purpose interface bus (GPIB) card used for driving the incubator, the frequency meter, and the power supply. Software based on event-driving controls the power supply, the incubator and the frequency meter through the DIO card and the GPIB card, reads multiple sets of data of each set temperature point and stores the data inside a computer database. The multiple sets of data are synthesized into a plurality of five-order functions in a set temperature range, and a best curve is calculated by the software. Each coefficient of the best curve is extracted, and is converted into numbers inside the an internal memory of a crystal oscillator chip through an analog to digital (A / D) converter, and therefore the number of capacitors controlled by the memory is changed, and the purpose of high-accuracy temperature compensation of the crystal oscillator is achieved. The high-accuracy temperature compensation crystal oscillator system and the operational method of the high-accuracy temperature compensation crystal oscillator system can be produced in scale and are high in working efficiency.

A system may include a first circuit configured to generate a first clock having a first period of oscillation, and a second circuit configured to generate a second clock having a second period of oscillation, where the difference (ΔT) between the first period of oscillation and the second period of oscillation remains within a specified limit even during variations in temperature and / or during variations in the supply voltage. The system may further include a control circuit, which may receive the first clock and the second clock, and adjust, according to ΔT, a first target parameter corresponding to a first number of cycles of the first clock, when a current cycle count of the second clock reaches a second target parameter corresponding to a second number of cycles of the second clock. The control circuit may also adjust, according to ΔT, the second target parameter when the current cycle count of the second clock reaches the second target parameter, and generate, based on counted cycles of the second clock, an output clock having an output period higher than the first period and the second period.

Resistor bias circuitry is included in components of an XTAL oscillator system to reduce 1 / f noise. An XTAL oscillator includes a resistor bias circuit attached to the XTAL core. A common mode feedback OP amp connected to the XTAL core also includes a resistor bias circuit. An XTAL oscillator chain includes an XTAL core, common mode feedback OP amp, common mode logic buffer (CML BF), and differential to CMOS converter (D2C) each with resistor bias circuitry.

The invention provides a linear vibration motor, which comprises a magnetic circuit system and an oscillator system, wherein the magnetic circuit system comprises a main magnetic circuit system and two secondary magnetic circuit systems; the main magnetic circuit system comprises first magnetic steel, a pole shank and second magnetic steel which are sequentially stacked along the vibration direction of the oscillator system; the first magnetic steel and the second magnetic steel are arranged in a homopolar opposite manner; each secondary magnetic circuit system comprises third magnetic steel; two opposite sides of the pole shank are homopolar opposite; and the polarities of homopolar opposite magnetic poles of the third magnetic steel are opposite to that of the homopolar opposite magnetic pole of the main magnetic circuit system. Compared with a related technology, the linear vibration motor provided by the invention has the advantages that the first magnetic steel and the second magnetic steel are arranged in a homopolar opposite manner and the secondary magnetic circuit systems are arranged at two opposite sides of the main magnetic circuit system, so that the magnetic field intensity of the magnetic circuit system is increased.

An RFID transponder detector is provided having a coupled oscillator system. Coupled first and second LC of the system produce a detection signal each time a combination of pulses is applied to the LC pairs. Application of the pulses is repeated periodically to produce a sequence for detection signals having two different first and second detection frequencies. Transmitting the sequence of detection signals results in corresponding first and second response signals having the first and second detection frequencies at the LC pairs. Values of a preselected detection parameter for the detection signals are compared to the values of the detection parameter for the response signals to determine if a transponder having a transponder resonant frequency corresponding to the first or second detection frequency is present in a proximal space of the transponder detector.

A magnetic drive and mechanical oscillator system comprising a mechanical oscillator, a coil, a means for providing alternating current to said coil thereby creating a magnetic field within and about the coil, said means including an on-off means and a ferromagnetic material in communication with the diaphragm of the mechanical oscillator and the coil.

The invention discloses a method for processing active-standby switching of a clock system. The clock is used as the output; the output of the clock selection circuit is locked by the phase-locked loop circuit to obtain the output clocks of the main and standby clock systems; the output clocks are driven to each service single board point-to-point. Also disclosed is a device for processing active-standby switching of a clock system, which is characterized in that both the main and standby clock systems include a crystal oscillator, a clock selection circuit, a phase-locked loop circuit and a clock drive circuit. The invention solves the problems that the clock phase difference is too large and the bit error rate is high in the main and standby switching process.

The invention discloses an insulator nondestructive testing technique based on a resonant acoustic principle, a modal analysis method is used, nondestructive testing can be realized by a single-degree-of-freedom oscillator system, the single-degree-of-freedom oscillator system comprises a mass block, a spring and damping, the three basic elements of the system are quality m, stiffness k and damping c, the state of the system can be described by the displacement of the mass block, energy input into the system by exciting force F is shown as kinetic energy of the mass block and elastic potential energy of the spring, defective parts can effectively be selected from qualified parts by the continuous dissipative damping resonant acoustic technology, and the insulator nondestructive testing technique has a wide detection range, and can detect all defects in a whole insulator, detection efficiency is high, and the insulator large area survey can be achieved.

Systems and methods which provide oscillator configurations implementing phase rotation (rotated-phase-tuning (RPT)) are described. Embodiments of a RPT oscillator may employ phase interpolation, whereby two current vectors having different phases are superimposed to provide a resultant current vector having a tunable phase to vary a phase shift in a feedback loop of an oscillator circuit and correspondingly tune the oscillation frequency. Phase rotation provided by an RPT oscillator configuration of embodiments inserts a negative phase shift (rotation phase shift) into each of two current branches to rotate the phase shifts of a phase-tuning technique, such as for avoiding phase ambiguity with respect to tunable oscillation frequencies. RPT oscillators of embodiments are varactor-less and are particularly well suited for operation to provide output frequencies in the millimeter-wave (mmW) band.